40605855879 has 4 divisors (see below), whose sum is σ = 54141141176. Its totient is φ = 27070570584.

The previous prime is 40605855859. The next prime is 40605855949. The reversal of 40605855879 is 97855850604.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 40605855879 - 2⁸ = 40605855623 is a prime.

It is a super-2 number, since 2×40605855879² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40605855859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6767642644 + ... + 6767642649.

It is an arithmetic number, because the mean of its divisors is an integer number (13535285294).

Almost surely, 2^40605855879 is an apocalyptic number.

40605855879 is a deficient number, since it is larger than the sum of its proper divisors (13535285297).

40605855879 is a wasteful number, since it uses less digits than its factorization.

40605855879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13535285296.

The product of its (nonzero) digits is 12096000, while the sum is 57.

The spelling of 40605855879 in words is "forty billion, six hundred five million, eight hundred fifty-five thousand, eight hundred seventy-nine".